package service.impl;

import dao.UserDao;
import dao.impl.UserDaoImpl;
import service.UserService;


/**
 * @author 千锋教育
 * @Company http://www.mobiletrain.org/
 * @Version 1.0
 */
public class UserServiceImpl implements UserService {
    //多态： 父类的引用指向子类对象
    UserDao userDao = new UserDaoImpl();


}
